export default {
    md5(string) {
        function md5RotateLeft(lValue, iShiftBits) {
            return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits))
        }

        function md5AddUnsigned(lX, lY) {
            let lX4, lY4, lX8, lY8, lResult
            lX8 = (lX & 0x80000000)
            lY8 = (lY & 0x80000000)
            lX4 = (lX & 0x40000000)
            lY4 = (lY & 0x40000000)
            lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF)
            if (lX4 & lY4) {
                return (lResult ^ 0x80000000 ^ lX8 ^ lY8)
            }
            if (lX4 | lY4) {
                if (lResult & 0x40000000) {
                    return (lResult ^ 0xC0000000 ^ lX8 ^ lY8)
                } else {
                    return (lResult ^ 0x40000000 ^ lX8 ^ lY8)
                }
            } else {
                return (lResult ^ lX8 ^ lY8)
            }
        }

        function md5F(x, y, z) {
            return (x & y) | ((~x) & z)
        }

        function md5G(x, y, z) {
            return (x & z) | (y & (~z))
        }

        function md5H(x, y, z) {
            return (x ^ y ^ z)
        }

        function md5I(x, y, z) {
            return (y ^ (x | (~z)))
        }

        function md5FF(a, b, c, d, x, s, ac) {
            a = md5AddUnsigned(a, md5AddUnsigned(md5AddUnsigned(md5F(b, c, d), x), ac))
            return md5AddUnsigned(md5RotateLeft(a, s), b)
        }

        function md5GG(a, b, c, d, x, s, ac) {
            a = md5AddUnsigned(a, md5AddUnsigned(md5AddUnsigned(md5G(b, c, d), x), ac))
            return md5AddUnsigned(md5RotateLeft(a, s), b)
        }

        function md5HH(a, b, c, d, x, s, ac) {
            a = md5AddUnsigned(a, md5AddUnsigned(md5AddUnsigned(md5H(b, c, d), x), ac))
            return md5AddUnsigned(md5RotateLeft(a, s), b)
        }

        function md5II(a, b, c, d, x, s, ac) {
            a = md5AddUnsigned(a, md5AddUnsigned(md5AddUnsigned(md5I(b, c, d), x), ac))
            return md5AddUnsigned(md5RotateLeft(a, s), b)
        }

        function md5ConvertToWordArray(string) {
            let lWordCount
            let lMessageLength = string.length
            let lNumberOfWordsTemp1 = lMessageLength + 8
            let lNumberOfWordsTemp2 = (lNumberOfWordsTemp1 - (lNumberOfWordsTemp1 % 64)) / 64
            let lNumberOfWords = (lNumberOfWordsTemp2 + 1) * 16
            let lWordArray = Array(lNumberOfWords - 1)
            let lBytePosition = 0
            let lByteCount = 0
            while (lByteCount < lMessageLength) {
                lWordCount = (lByteCount - (lByteCount % 4)) / 4
                lBytePosition = (lByteCount % 4) * 8
                lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition))
                lByteCount++
            }
            lWordCount = (lByteCount - (lByteCount % 4)) / 4
            lBytePosition = (lByteCount % 4) * 8
            lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition)
            lWordArray[lNumberOfWords - 2] = lMessageLength << 3
            lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29
            return lWordArray
        }

        function md5WordToHex(lValue) {
            let WordToHexValue = ''
            let WordToHexValueTemp = ''
            let lByte
            let lCount
            for (lCount = 0; lCount <= 3; lCount++) {
                lByte = (lValue >>> (lCount * 8)) & 255
                WordToHexValueTemp = '0' + lByte.toString(16)
                WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2)
            }
            return WordToHexValue
        }

        function md5Utf8Encode(string) {
            string = string.replace(/\r\n/g, '\n')
            let utftext = ''
            for (let n = 0; n < string.length; n++) {
                let c = string.charCodeAt(n)
                if (c < 128) {
                    utftext += String.fromCharCode(c)
                } else if ((c > 127) && (c < 2048)) {
                    utftext += String.fromCharCode((c >> 6) | 192)
                    utftext += String.fromCharCode((c & 63) | 128)
                } else {
                    utftext += String.fromCharCode((c >> 12) | 224)
                    utftext += String.fromCharCode(((c >> 6) & 63) | 128)
                    utftext += String.fromCharCode((c & 63) | 128)
                }
            }
            return utftext
        }
        let x = []
        let k
        let AA
        let BB
        let CC
        let DD
        let a
        let b
        let c
        let d
        let [S11, S12, S13, S14, S21, S22, S23, S24, S31, S32, S33, S34, S41, S42, S43, S44] = [7, 12, 17, 22, 5, 9, 14, 20, 4, 11, 16, 23, 6, 10, 15, 21]
        string = md5Utf8Encode(string)
        x = md5ConvertToWordArray(string)
        a = 0x67452301
        b = 0xEFCDAB89
        c = 0x98BADCFE
        d = 0x10325476
        for (k = 0; k < x.length; k += 16) {
            AA = a
            BB = b
            CC = c
            DD = d
            a = md5FF(a, b, c, d, x[k + 0], S11, 0xD76AA478)
            d = md5FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756)
            c = md5FF(c, d, a, b, x[k + 2], S13, 0x242070DB)
            b = md5FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE)
            a = md5FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF)
            d = md5FF(d, a, b, c, x[k + 5], S12, 0x4787C62A)
            c = md5FF(c, d, a, b, x[k + 6], S13, 0xA8304613)
            b = md5FF(b, c, d, a, x[k + 7], S14, 0xFD469501)
            a = md5FF(a, b, c, d, x[k + 8], S11, 0x698098D8)
            d = md5FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF)
            c = md5FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1)
            b = md5FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE)
            a = md5FF(a, b, c, d, x[k + 12], S11, 0x6B901122)
            d = md5FF(d, a, b, c, x[k + 13], S12, 0xFD987193)
            c = md5FF(c, d, a, b, x[k + 14], S13, 0xA679438E)
            b = md5FF(b, c, d, a, x[k + 15], S14, 0x49B40821)
            a = md5GG(a, b, c, d, x[k + 1], S21, 0xF61E2562)
            d = md5GG(d, a, b, c, x[k + 6], S22, 0xC040B340)
            c = md5GG(c, d, a, b, x[k + 11], S23, 0x265E5A51)
            b = md5GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA)
            a = md5GG(a, b, c, d, x[k + 5], S21, 0xD62F105D)
            d = md5GG(d, a, b, c, x[k + 10], S22, 0x2441453)
            c = md5GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681)
            b = md5GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8)
            a = md5GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6)
            d = md5GG(d, a, b, c, x[k + 14], S22, 0xC33707D6)
            c = md5GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87)
            b = md5GG(b, c, d, a, x[k + 8], S24, 0x455A14ED)
            a = md5GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905)
            d = md5GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8)
            c = md5GG(c, d, a, b, x[k + 7], S23, 0x676F02D9)
            b = md5GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A)
            a = md5HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942)
            d = md5HH(d, a, b, c, x[k + 8], S32, 0x8771F681)
            c = md5HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122)
            b = md5HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C)
            a = md5HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44)
            d = md5HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9)
            c = md5HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60)
            b = md5HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70)
            a = md5HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6)
            d = md5HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA)
            c = md5HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085)
            b = md5HH(b, c, d, a, x[k + 6], S34, 0x4881D05)
            a = md5HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039)
            d = md5HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5)
            c = md5HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8)
            b = md5HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665)
            a = md5II(a, b, c, d, x[k + 0], S41, 0xF4292244)
            d = md5II(d, a, b, c, x[k + 7], S42, 0x432AFF97)
            c = md5II(c, d, a, b, x[k + 14], S43, 0xAB9423A7)
            b = md5II(b, c, d, a, x[k + 5], S44, 0xFC93A039)
            a = md5II(a, b, c, d, x[k + 12], S41, 0x655B59C3)
            d = md5II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92)
            c = md5II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D)
            b = md5II(b, c, d, a, x[k + 1], S44, 0x85845DD1)
            a = md5II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F)
            d = md5II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0)
            c = md5II(c, d, a, b, x[k + 6], S43, 0xA3014314)
            b = md5II(b, c, d, a, x[k + 13], S44, 0x4E0811A1)
            a = md5II(a, b, c, d, x[k + 4], S41, 0xF7537E82)
            d = md5II(d, a, b, c, x[k + 11], S42, 0xBD3AF235)
            c = md5II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB)
            b = md5II(b, c, d, a, x[k + 9], S44, 0xEB86D391)
            a = md5AddUnsigned(a, AA)
            b = md5AddUnsigned(b, BB)
            c = md5AddUnsigned(c, CC)
            d = md5AddUnsigned(d, DD)
        }
        return (md5WordToHex(a) + md5WordToHex(b) + md5WordToHex(c) + md5WordToHex(d)).toLowerCase()
    }
}